19 thoughts on “Adding a serial port to the Zipit

  1. Cripes, that makes my hand cramp just looking at it. with the comparison to the serial connector, my thumb would cover a third of the keyboard.

    Nice clean job though. Always like seeing clean, seamless work.

  2. yea I almost went out and bought one of these after seeing it, but the place I found free shipping on also had pictures of someone holding it, looks about the size of a game boy ad-sp

    312mhz and 32mb of ram with a keyboard for 50$ is not bad, then you see its super tiny and has a “transmissive” screen, I dunno maybe I can see one up close first

  3. You won’t be touch typing on it but it’s not much different than a Blackberry. The battery life is pretty good. I’ve gotten 4 hours or so out of mine. The screen isn’t nice like an iPod Touch but it’s not terrible either. Overall it’s a really good deal for the price.

  4. If you are running IZ2S or one of the two variants on the Zipit you can get upto 14hours of battery life under real world conditions of small 20 to 30 minute bursts with periods of inactivity. and typing is pretty good on the zipit no matter what distro and kernel you are running. i type better on it than on my cellphone qwerty keyboard.

  5. It already comes with Linux on it but it’s skinned to make it easy to use for IM, etc. Rkdavis has a shell called ez2s that you can put on an SD card that will unlock the potential of it but I went a step further and re-flashed the kernel on mine. I have ubuntu on one SD card and side-track linux(made by Irongeek) on another SD card. I can just reboot to switch between the two distributions.

  6. There is a big connector in the back of the Zipit that has loads of connections broken out from the CPU– one of them being USB port capable of being host.

    I linked to the MFG’s wiki. You have to join the wiki to see the pinouts but it’s all there.

  7. @Paul

    The RX/TX lines on the board are probably 3.3v logic.. he’s then added a maxim level convertor that shifts up/down to/from rs232 levels (or close enough, read the datasheet). You should be able to drive RS232 hardware with this, but you don’t have any control lines. If there is some spare GPIO pins around you could use those for that though.

  8. OMG! thats a tight spot then a small device to make it worse then its pro work I WANT A ZIPIT!! its SOOOO hackable D: but its so small my hand would cover the hole thing when closed …

  9. I’d love to have control lines but I’d also have to use a larger level shifter chip and it might be harder to fit. Also would have to fit a different type of plug with more than 3 conductors. Not sure where the other GPIO lines are located either…

  10. You could probably subvert a few lines from the rear connector that aren’t being used (maybe the camera lines?) but it would require some creative cable making (dual header — rear connector plus your serial mod) and some convoluted s/w

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